Jack.



J.E.CAMR

JACK.'

APPLICATION FILED MAR. 1,4911.

Lwm Patented Apr. 27', 1915.

4 SHEETS-SHEET 1- 1. E. CAMP.

JACK.

APPLICATION FILED MAIL l, 19H

Patented Apr. 27, 1915.

4 SHEETS-SHEET 2.

J. E. CAMP.

JACK. APPLICAHON mn MAR,|.1911.

` Lyg Patented Apr. 27, 1915,

4 SHEETS-SHEET 3.

l. E. CAMP.

JACK.

APPLICAHON FILED MAR. l* 191.1.

Patented Apr. 2T, 1915.

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4 SHEETS-SHEET 4.

M UF W 2 Zw W i JW? L rosnPH n. CAMP, or wAvsHrNeT-on, iLLrlvors.

JACK. f.

Macnee.

i Specification of Letters Patent.

Application led Mareh1`j1911. I Serial No. 611,694..

To all avi/ rom 'it may concern l Be it known that l, JOSEPH E. CAMP, citizen of the United States, residing at Washington, in the county of Tazewell and State Auseful Improvements in Jacks;

-hereby declare that the following is a full,

piston-head indicated in dotted lines in Fig.

of llllnois, have invented certain new and and l do clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make-and use the Same.

This invention relates to a hydraulic wagon-jack pertaining particularly to a jack for raising and dumpin wagons, and for raising automobiles bodi y for making repairs thereto.

An object of the invention is to provide a littiiigmeinber operated by means of hydraulic pressure vthrough a reclining cylinder into which fluid is pumped.

Another object is to. provide, in a device of this kind, a -series of pivotally connected members or links including means whereby to lock them relatively all of which, however, will appear in the following specification aided by the accompanying drawings in which Figure 1 is a plan of my jack. Fig. 2 is a side elevation of the same. Fig. 3 is a plan of a part of a piston-rod and a cross-head showing links connected thereto. Fig. 4 is a view of a saddle to engage and raise the axle of a vehicle. Fig. 5 is an end elevation of the same. Fig. 6 is a detail showing the pivotal connection between a link and a part carried by the saddle shown in Figs. 4 and Fig. 7 shows portionsof a pair of guides in perspective. Fig. 8 is a transverse sectionl ,of one of the guides shown in Fig. 7, t0- gether with other parts-including a gear wheel and rack. Fig. 9 is a plan .of portions of my jack showing duplicate saddles. Fig. 10 is a side elevation of parts of the'same. Fig. 11 shows portions of a guide in perspective. Fig. l2 is a detail of a link connection, Fig. 13 is a transverse section of a guide and parts of the links shown in Fig. 12, and means to secure them inrigid relation. Fig. 14.- shows the top of the guide and one of the links in cross section. Fig. 15 is an elevation of a guide and a modified form of pivotally connected links, and means to fix, them relatively. Fig.

' 16 is a side elevation ot the same showing the guide in part section, and Fig. 17 is a transverse section of the same.

1n Figs. land 2, A indicates a long nar- Patented apr. at, lala. I

row platformhaving a portion B extending transversely thereof near one end secured in I"rigid manner thereto by any good means. Lying upon the platform at one end is a cylinder C substantially in-the position shown; there being a piston-rod D having the usual stantially upright position and this cylinderv in the present application lies flat upon the platform as already stated, and, as with the cylinder .of said patent, that in the present case is adapted for holding a fluid, such as oil, which is pumped from one side of the piston E to the other and this is-done through a pipe system and a pump. The latter is indicated at F and consists vof a cylinder stationed between the members composing the portion B of the platform. To

the piston-rod G of saidpump is connected a pitman G through which motion istransmitted by an eccentric H on a shaft J driven from any source o'power in any one of the usual ways,

A pipe K is connected at one end into the rear end of the pump and its other end is connected into the outer end of the cylinder C where it will deliver fluid behind the piston E to move it forward. L is a pipe lalso connected at one end into the inner end of the pump and at its other end into the inner end of the said cylinder C so that fluid can be pumped from that end into the said outer end of the cylinder behind the said piston E. In each said `pipe is a check-valve K and L respectively to permit passage of the fluid only in the proper direction as will be understood. Mounted above the cylinder is a vessel M connected with the inner end of the cylinder by a pipe N and connected also with the pipe K by meansof a pipe O 'controlled by a valve P through. a'rod Q operated by the attendant. The said vessel M is eniployed for holding oil displaced by the piston-rod D and through it the fluid passes from one end of the cylinder to the other at certain times as will appear later.

rlhe piston-rod D is. provided with a crossl and firmlysecured to the said blocks.

form beneath each is toothed rack U with which the said gears mesh. Mounted. I, upon theplatform also, are two guides or tracks `V which terminate at one end adjaf,- v cent to the cylinder, the other ends curving,

upward as clearly shown in Fig. 2; these curve ends being supported, for instance, upon blocks VV only one of which is seen in Fig. 2 On the opposite end of the platform from thatghaving the cylinder is a third guide or track 2, its outer end being straight and its other end curved upward and terminating -between the upturned guides V and resting also upon a block W, Fig. 2,fall three o"f the guides being lpro erlly of these said guides, or tracks, as shown in several of the figures of the drawing and particularly in A7, 8, 11 and 14, consists of two U-sha-ped members placed opposite one another substantially in the positions shown and spaced apart to leave an opening 3 be tween them, the upper'ends as'shown in Fig.` 7 being` fixed relatively by means 4for example of plates 4. As shown in Figs. l, 2 and8 overhanging brackets 5 are provided which are suitably secured to the upper guide sections and these said brackets are arched over the toothed rack L and secured to the side of the platform beingthus arched in order to permit'the gears T to pass beneath them while properly holding said upper sections firmly with reference to the lower ones, said lower ones being suitably secured lto the platform. Both 'said guide sections are thus properly spaced apart so that the shaft S may move between them. The cross-head R has an extension. 6 whose ends project between the upper and lower guide portions as indicated in 'Fig` 1, and

vsaid extremities are providedwith rollers 7, see Fig. 3 which move inside the guides andto said extremities are attached the links of two chains 8, at each of whose pivot'isga pair. of rollers 7, said chain extending through the guides and terminating above the upturned ends of the same where they yare attached to a saddle g'consis'ting of a blockhaving a recess 10 in its upper side to engage the axle of'a vehicle; its' lower side being provided with depending portions 11, for instance, carrying a shaft 12 from which hangers 13 depend to which the end links of the chains just mentioned are pivoted. .A chain 14 corresponding to the chains 8 is carried in the guide 2 hereinbefore mentioned, and .this chain is likewise'attached to a central depending hanger 15 on the shaft 12 of the saddle 9 and which corresponds to the members 13', there being rollers 16 on this chain corresponding to the rollers 7. A peculiarity ofthe chains is that their links, as clearly shown in Figs.- 4, 5 and 6, are each provided at each end, opposite the pivot pins, with extending lugs 82 as shown in Fig. 5, which meet when the said linksgform a straightline, said lugs being thu'sprovided so that said links can pi-vot upon one another only in one direction beyond a straight line. The links pivot upon one another as they pass up the curved end of the'guides V, for instance, and upon' passing beyond the end of the latter they would remain in an upright position one upon another by reason of the abutting lugs 82, if there were no outside forces to cause them to move on their pivots and collapse. Now, since the chain 14 is constructed in the same manner but is reversed in position, its extensions thereof being at the opposite side of a link, as will be seen by comparing Figs. 5 and 6, it will be atronce understood that one set of links will support or brace the other setv and the chains will thus arise as a straight rod. To make the use of these lugs clear and also to show the operation of the jack, it is to be stated that as the cross-head R moves forward, due to the fluid pressure against thepiston E, the gears T meanwhile guiding the head in its forward movement and preventing the piston rod from springingsdewise, the chains 8 are pushed along the guides V, radually forcing them upward outside te upright portions of said guides. As this occurs, the chain 14 is liftedup throughits guide 2 and as all three of the chains reach a vertical position, the .oppositely placed extensions of their links prevent the saddle 9 from swinging laterally in either direction.

As shown in Fig. 1 indotted lines the vehicle to be raised is driven lengthwise of the platform and the front wheel-s rest upon the part B, the axle being immediately over `the said saddle 9 as shown in Fig. 2.

I have adapted the jack for raising automobiles bodily by engaging both axl'es and this is done by using duplicate saddles 9. The guides corresponding to V and` 2 are indicated in-said Fig. 2 by 17 and 18 respectively and the saddles are shown at 9. In order to accommodate automobiles, most of which vary in distance between the axles, the platform -is made in two parts indicated by A and A2 the ends of which are shown adjacent each other in Fig. 10. These are adjustable relatively by means, for instance, of bars 19 bolted to the adjacent ends of said parts, said bars being slotted asiat 20, for example, to permit the portions of the platform to shift end-wise. Since thisprovision is made, means must also be provided for adjusting those parts which-shift the chains within the guides and it may be said that in this figure instead of pushing the piston outward from the cylinder in they direction of the saddles, it is drawn in the oppositedirection by reversing the direction of movement of the fluid pumped 'through the pipes andin thus ap- Macnee plying the power a pull instead of a push upon the chains with which the piston-rod is connected, is the result. To the crosshead It on the piston in this instance is secured a rod 21 which extends in the direction of the saddles 9 between the guides 17. Attached to said rod are two members 22, for example, forming a link, and lying at opposite sides of the guide 18. The opposite ends of these said members 22, are secured to a duplicate of rod 21 indicated at23,\which, in turn, is, provided with two members 2/1, said members 22 being adjusted upon the part 23 through bolts 25 and aper tures 26 in said part adjusted in length as well as the parts of the platform. The members 22 and 2l are connected to the chains in the 'guides 18 and. 22 in any suitable manner, as for instance,by means of bolts 27, one of saidv chains being shown in Fig. 9 by the numeral 28. By this means when the piston rod is being drawn within the cylinder, the chains within the guides 18 will be carried up through the latter, Ithe chainsin the guides 17 following in the same manner as does the chain 14 in the guide 2 described with reference to Fig'. 2. I have shown in Figs. 12, 13 and 14 a modification of a link structure by which one of the guides, for instance, 2 in Fig. 2, and 17 in Fig. 9, might be eliminated; said links carrying means for locking them relatively rigid when arising in a vertical line out of the guide. l

It will be noted in the figures referred to that the links indicated by a and Z) are p ivoted substantially as before and have the meeting shoulders ai d which prevent them from'moving upon one another beyond a straight line in one direction, but said links are free to move in their opposite direction and it is my object to hold the links firmly in alinement or when in the position shown in Figa` 13 and in order that this may be shown I mount upon one side of each link an arm e carrying a gear f, both being carried on a pin g extending through said link and provided at the opposite side of said link with a head as at h, there being a friction washer vor spring j beneath said head to provide constant friction and normally the arm e occupies the position shown in Fig. 12. Near the upper end of the track and indicated at t' in Fig. 13 is mounted a toothed rack m with which the gears f'of the limbs engage as they 4pass upward. This engagement results in imparting substantially a one-half turn to they gear and the arm thus placing the latter in position shown in said Fig. 13 where it overlies part of both` limbs there beingaa shoulder 'mf extending outward from the adjacent link against which the free end of the arm may abut. By

4T he guide in before.

23 so that the entire rod connection controlled bythe piston can be'y this means it will be seen that the chain -upon passing outside of and above the guide will retain a practically rigid vertical position. v

In Figs. 15,16, and 17 is shown another manner of securing the links relatively. these figures is-shown atoy and the rollers which carry the chain, made up ofthe links indicated by p, are carried in the slot created between the two guide' as shown in Fig. 16; the pivots of the linksv forming the axles for said rollers as As in the linksare provided with the meeting shoulders c] corresponding to shoulders 0l of the other figures, while each link is provided o pposite the pivot with a projecting tooth or lug r. An arm s is pivoted on-the link by means of a pin t extending throughthe latter, and said arm is provided with a friction roller u. Upon one of the surfaces of the guide 0 is a cam-track o which may be cast with said guide or secured thereto; this said trackbeing made up of two oppositely placed members spaced apart a distance substantially equal to the diameter of the roller u, and, as shown Iin Fig; 15, the upper end of the track terminates near the middle of the width of the link while the lower end terminates substantially outside the line of the links.

parts of saidVV 'i form described above, the

In the figure last named, it will be ob served that as the chain'amoves upward with the arms s normally in the position been done the chain still moving upward out of the guide will be maintained in 'a rigid descends the rollers will enter between the track portions and follow it until, upon passing out at the lower end, the arms s will have been removed from the vicinity of the teeth or lugs 1 thus permitting the links to move on their pivots in passing around the curve of the track.

` The operation of the jack is much the same as that of my issued patent referred to. The vehicle, whether-it be a wagon to be dumped or an automobile to be raised entirely from the ground, is driven over the jack so as to bring the axle or axles, as the case may be, above the respective saddles. The pump in changing the fluid from one end of the cylinder to the other moves the piston in a direction to cause theupright position. When Athe chain 'position To lower said vehicle the valve able 1n said 1s opened thus letting, the `fluid move in the opposite direction due to pressure caused by the Weight of the Wagon which latter descends to the ground. -With a reclining cylinder such as I use a vehicle can be readily driven over it can be applied directly to the chains either by pushing them or by a p'ull upon them, the entire structure being quite Simple yet ef- -fective. 4

Having thus described my invention, I claim r*v `l. In a jack, port, a guide or cluding an upright portion, a member slidguide comprising a series of pivotally connected portions each including a lateral extension at each end and at one side of the pivot points of said portion, a second guide or track also including an upright portion opposed in position to that of the first said` guide, and spacedsidewise therefrom, a member slidable in said guide and made up of a series of pivotally connected portions and each including a lateral extension at each end at points of said portion, and a stirrup to the combination of a supand the power thereof track mounted thereon inone side of the pivot which one of the is pivoted.

2. The combination in a jack, of a support, a guide comprising tvvo spaced track portions reclining thereon and having an upturned end terminating in a substantially upright portion, a member slidable therein comprising a series of -pivotally connected portions, rollers carrying the portions, each of the latter having forming an abutment, a` second guide disposed opposite to the first and havin an upturned part terminating in the vicinity of that of the rst guide and spaced therefrom; a member slidable in the same and likewise composed of a series of pivotally related portions and each provided with means for limiting the movement of said portions relatively in one direction, and a portions of each member,

a face at each end.

stirrup to Which both said members lare connected above the said upturned ends of the guides.

In testimony whereof I aflix my signature, in presence of two Witnesses.

JOSEPH E. CAMP. Witnesses:

E. J. ABERsoL, L. M. THURLow. 

